CN113094551B - Method, device, server and system for retrieving videos of automobile data recorder - Google Patents
Method, device, server and system for retrieving videos of automobile data recorder Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/70—Information retrieval; Database structures therefor; File system structures therefor of video data
- G06F16/78—Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually
- G06F16/7867—Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually using information manually generated, e.g. tags, keywords, comments, title and artist information, manually generated time, location and usage information, user ratings
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/70—Information retrieval; Database structures therefor; File system structures therefor of video data
- G06F16/73—Querying
- G06F16/732—Query formulation
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/008—Registering or indicating the working of vehicles communicating information to a remotely located station
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
- G07C5/085—Registering performance data using electronic data carriers
- G07C5/0866—Registering performance data using electronic data carriers the electronic data carrier being a digital video recorder in combination with video camera
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Abstract
The invention relates to the technical field of video retrieval, in particular to a method, a device, a server and a retrieval system for retrieving videos of a vehicle recorder. The method comprises the following steps: generating a video calendar snapshot table, a video travel table and inquiring the video snapshot table; inquiring a time ascending list from the short video corresponding to the video calendar snapshot list; screening out a video travel time axis list meeting the requirements according to the video travel table; correspondingly inquiring a video snapshot table to acquire video details containing a target period; and returning the event video or the event picture in the video detail. The invention reduces the query scope through various pre-generated snapshot tables, and can quickly index to the record to be queried. In addition, because the video source file is compressed by time-lapse frame extraction, the video duration can be positioned after the specific time is searched through the corresponding metadata, the required video data can be conveniently intercepted, and the application end can inquire the video more conveniently and rapidly.
Description
Technical Field
The invention relates to the technical field of video retrieval, in particular to a method, a device, a server and a retrieval system for retrieving videos of a vehicle recorder.
Background
At present, video data of a traditional recorder is generally stored in a memory card at a device end, most of video files are not uploaded to a cloud end, when the video files need to be checked later, query parameters are sent to a remote car machine system by an application end and then are retrieved by the car machine system, the video data needed by a user cannot be quickly queried due to the fact that the car machine performance, wireless network speed are unstable, network interruption and storage capacity are limited, only the video data can be sampled and roughly turned over, smooth browsing and playing are not realized, and in addition, due to the fact that the video files are accessed remotely, the video files are large in size, blocking is easy to occur, and picture color blocks are difficult to generate.
For part of schemes, the video source files are compressed and uploaded, and although the video source files are convenient to access the cloud directly during access, the video source files have large storage cost for enterprises due to large capacity of the video source files, so that all videos cannot be clouded. Thus, the conventional scheme has the following disadvantages:
firstly, the statistical analysis query is inconvenient, query conditions are required to be sent to equipment, an equipment system queries out records meeting the conditions according to the conditions, and then the control equipment uploads catalog data, and finally all video data are uploaded to a cloud end to be uniformly analyzed;
secondly, the cloud of the video with the compressed code rate always reaches the bottleneck of storage capacity when the equipment amount and the data amount reach a certain scale, so that the video can be slower and slower during inquiry and warehousing, and finally the service development cannot be supported;
thirdly, along with the development of mobile internet technology, the functions of intelligent car machines are more and more, besides the conventional video files, more inquiry demands are also provided on a user side, and at the moment, the conventional inquiry mode is difficult to support the inquiry speed demands of more conditions.
Fourth, even if the data such as the video is stored in the cloud, the data cannot be quickly retrieved because the reasonable logic storage processing classification is not performed, and if the video file list is forcedly queried in real time, firstly, the number of records is huge, secondly, the condition is numerous, the query is long, and the physical examination of the client is seriously affected.
The above searching modes have obvious defects, and the implementation of the methods has some limiting conditions, so that the purpose of real-time searching is difficult to achieve when large data is searched and analyzed by mass data.
Disclosure of Invention
Aiming at the technical problems, the embodiment of the invention provides a method, a device, a server and a system for searching videos of a vehicle recorder, which are used for solving one or more problems that the conventional vehicle recorder is inconvenient to search videos and the searching purpose is difficult to achieve.
A first aspect of an embodiment of the present invention provides a method for retrieving a video of a vehicle recorder, where key frames in the video of the vehicle recorder are combined into a short video with a shortened period, the method includes: generating a video calendar snapshot table, a video travel table and a query video snapshot table according to the short video; inquiring a time ascending list meeting the requirements from the short video according to the video calendar snapshot list corresponding to the inquiring time; according to the effective date, the corresponding video schedule screens out a video schedule time axis list meeting the requirements from the calendar video data; according to the video time period parameters, correspondingly inquiring a video snapshot table, and acquiring video details containing a target time period from the video travel time axis list; and returning the event video or the event picture in the video detail.
Optionally, the returning the event video or the event picture in the video detail specifically includes: searching metadata of the corresponding event according to the video travel time axis list; acquiring an event video or an event picture according to metadata of the corresponding event; and returning the event video or the event picture.
Optionally, after querying out calendar-compliant video data from the video calendar snapshot table according to the query time, the method further comprises: and returning the queried calendar video data to the application end so that the application end displays the calendar video data through the UI interface.
Optionally, after querying a video schedule according to the effective date to screen out a satisfactory video schedule time axis list from the calendar video data, the method further includes: and returning the screened video travel time axis list to the application end so that the application end displays the video travel time axis list in a form with a playing window and a visual time axis.
Optionally, according to metadata of the corresponding event, an event video is obtained, specifically: finding out video files and structured data of corresponding time periods according to the metadata; downloading the video files and the structured data in batches; positioning to an accurate video time frame according to the structured data; calculating the video duration of the corresponding moment according to the video moment frame; intercepting video data of a plurality of intervals before and after the time frame according to the video duration; and carrying out video merging on the video data at the intervals to obtain event videos.
Optionally, according to metadata of the corresponding event, an event picture is obtained, specifically: acquiring metadata details according to metadata links; traversing metadata details, and finding a video frame nearest to the query time; and extracting the video frame and storing the video frame into a picture format to obtain an event picture.
A second aspect of an embodiment of the present invention provides a retrieval device for a video of a vehicle recorder, including:
the generation module is used for generating a video calendar snapshot table, a video travel table and a query video snapshot table according to the short video; the first query module is used for querying a time ascending list meeting the requirements from the short video according to a video calendar snapshot table corresponding to the query time; the screening module is used for screening a video travel time axis list meeting the requirements from the calendar video data according to the effective date and the corresponding video travel table; the acquisition module is used for correspondingly inquiring a video snapshot table according to the video time period parameter and acquiring video details containing a target time period from the video travel time axis list; and the return module is used for returning the event video or the event picture in the video detail.
Optionally, the return module includes: the searching unit is used for searching metadata of the corresponding event according to the video travel time axis list; the obtaining unit is used for obtaining an event video or an event picture according to the metadata of the corresponding event; and the return unit is used for returning the event video or the event picture.
A third aspect of the embodiment of the present invention provides a service end of a video of a vehicle recorder, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the retrieval method as described above when executing the computer program.
A fourth aspect of an embodiment of the present invention provides a retrieval system for a video of a vehicle recorder, including:
an application end; a vehicle-mounted end; the service end of the automobile data recorder video is respectively connected with the application end and the vehicle-mounted end; the server side executes the searching method based on the application side and the vehicle-mounted side.
According to the method for searching the video of the automobile data recorder, provided by the embodiment of the invention, the query range is narrowed through various pre-generated snapshot tables, and records needing to be queried can be rapidly indexed. In addition, because the video source file is compressed by time-lapse frame extraction, the video duration can be positioned after the specific time is searched through the corresponding metadata, the required video data can be conveniently intercepted, and the application end can inquire the video more conveniently and rapidly.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
Fig. 1 is a block diagram of a retrieval system of a video of a vehicle recorder according to an embodiment of the present invention;
fig. 2 is a flow chart of a method for retrieving a video of a vehicle recorder according to an embodiment of the present invention;
fig. 3 is a block diagram of a retrieval device for a video of a vehicle recorder according to an embodiment of the present invention.
Detailed Description
In order that the invention may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "upper," "lower," "inner," "outer," "bottom," and the like as used in this specification are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
The video data retrieval is time-consuming and resource-consuming, particularly network traffic and hard disk storage space, and is very difficult to quickly retrieve and acquire due to large data volume. Referring to fig. 1, the search system includes: service end, application end and vehicle-mounted end of vehicle event data recorder video. In the embodiment of the invention, the vehicle-mounted end of the driving recorder is respectively interconnected with the service end and the application end, the vehicle-mounted end is provided with the driving recorder which is used for recording the video in the driving process, and the driving recorder can be configured according to the service end to combine a section of recorded long video extraction key frame into a section of shortened short video.
Here, it should be noted that, a section of recorded long video is extracted and key frames are combined into a short video with a shortened section, and instead of compressing the code rate of the original video, a section of video with a small change of long-time pictures is compressed into a short key drawing video, so that the video data can effectively reduce the space consumed by non-key video and the time watched by users.
Meanwhile, the automobile data recorder combines key frames in the video into a new time-lapse video file according to the speed, scene transformation and other combined video conditions, meanwhile, the metadata are stored in a queue, and finally, the video catalog record and the metadata are transmitted to a server side together, and the server side performs data analysis according to the uploaded record and uploads the data to a cloud for reasonable storage. Specifically, the server generates various data snapshot records of the internet of vehicles related service according to the short video, and in the following embodiments of the present invention, the various data snapshot records will be specifically described to include: video calendar snapshots, video schedules, querying video snapshots, and the like.
Finally, when a user requests video playback from an application end, the data snapshot records can be respectively inquired according to the retrieval conditions, the father snapshot is continuously traversed to the son snapshot to obtain a detail record meeting the conditions, and finally, effective video data is intercepted according to the detail record meeting the conditions, then video merging is carried out, and the video is uploaded to a cloud disk of a server end to generate a video link accessible by a public network; the downloading and uploading actions are in the same cloud environment, so that the speed is extremely high, and the waiting time of a user is greatly shortened.
According to the retrieval system for the video of the automobile data recorder, provided by the embodiment of the invention, the query range is continuously reduced through various pre-generated snapshot tables (calendar, travel, summary, detail, labels and the like), and records needing to be queried can be rapidly indexed. In addition, because the video source file is compressed by time-lapse frame extraction in the embodiment of the invention, the video duration can be positioned after the specific time is searched by searching corresponding metadata to position the specific time, thereby being convenient for intercepting the required video data. Specifically, whether a video exists or not can be positioned by inquiring a calendar, a video calendar interface is finally displayed at an application end, a calendar is clicked to acquire a video journey period, the video detail is quickly inquired out by locating a digital timestamp of the video detail through the journey period, a video event is inquired according to the detail period, and finally an event result is displayed for a client to browse and watch.
In the following, a method executed by a service end of a video of a vehicle recorder is specifically described. Referring to fig. 2, fig. 2 is a diagram illustrating a method for retrieving a video of a vehicle recorder according to an embodiment of the present invention, wherein key frames in the video of the vehicle recorder are merged into a short video with a shortened period at a vehicle-mounted end, and meanwhile, the vehicle recorder merges the key frames in the video into a new time-shortened video file according to merging video conditions such as speed and scene transformation, and simultaneously stores metadata in a queue, and finally, the video catalog record and the metadata are transmitted to a server together, as shown in fig. 2, the method includes the following steps:
and step 21, generating a video calendar snapshot table, a video travel table and a query video snapshot table according to the short videos.
In the embodiment of the invention, the server receives the video recording data, preprocesses the video recording, and finally generates the following data: video calendar records (corresponding to video calendar snapshots), video travel records (corresponding to video travel tables), video tag records (corresponding to video snapshots), video metadata records, video cloud storage records, so as to quickly match query conditions during later retrieval. Correspondingly, the interface retrieval flow corresponding to the subsequent application end is divided into: time period video record retrieval (calendar, travel, details, events), time of day event photo retrieval, time of day event video retrieval, etc.
And step 22, inquiring a time ascending list meeting the requirements from the short video according to the video calendar snapshot list corresponding to the inquiring time.
Video calendar recording in step 21 above: the list of up-ordered results meeting time can be queried from the video calendar snapshot table based on the start time and end time of the query.
The server side then returns the video calendar record to the application side, the application side displays the video calendar record to the user through the interface of the calendar UI, the user can select which day of video needs to be watched through various label icons and state identifiers on the calendar, and after clicking a certain date needing to be watched, the application side sends the watched date to the server side.
And step 23, screening out a video travel time axis list meeting the requirements from the calendar video data according to the effective date and the corresponding video travel table.
Video travel record in step 21 above: the video schedule can be queried according to the effective date, and a video schedule time axis list with specific time is further obtained, wherein the schedule time axis list comprises the starting time and the ending time of each schedule, video channels, video thumbnails, video file information, video states and the like.
The server returns the video travel to the application end, the application end displays the video travel by using a playing window and a visual time axis, various label states are attached on the time axis, a user can directly slide the label time axis or click a label to select the video, a thumbnail of the travel is displayed firstly during selection, and then a request of the video is initiated to the server end.
And step 24, correspondingly inquiring a video snapshot table according to the video time period parameter, and acquiring video details containing the target time period from the video travel time axis list.
Video tag record in step 21 above: video details can be queried through a video snapshot table based on video period parameters accurate to milliseconds.
Further, if the query result exists, the video event table is queried according to the time period of the detail record, and the query result and the video event table are combined into an independent data structure and returned to the application end. After the application end acquires the video link and the video event list, the application end starts to acquire a video source, starts to play the video, and simultaneously draws an event icon on the map of the application end.
And step 25, returning the event video or the event picture in the video detail.
Searching metadata of the corresponding event according to the video travel time axis list; then, according to the metadata of the corresponding event, obtaining an event video or an event picture; and returns an event video or an event picture.
If the event video is returned, the method specifically comprises the following steps: firstly, inquiring a video calendar snapshot table, and detecting whether a video calendar exists at the moment; and if so, continuing to query the video schedule, and querying video snapshot tables at intervals before and after the corresponding time according to the time of occurrence of the event.
If the video of the corresponding time period can be found, the video file and the structured data are downloaded in batches, the accurate video time frame is positioned according to the structured data, then the video time length of the video corresponding to the time is calculated by the frame, then the video data of a plurality of intervals (the intervals capable of being dynamically configured) before and after the frame are respectively intercepted according to the time length, then the video is combined, and finally the combined video can be returned. Specifically, the combined video can be uploaded to an intranet cloud space, and a public network download link is generated to download the video; it should be noted that the above downloading and uploading actions can be in the same cloud environment, so that the speed is extremely high, and the waiting time of the user is greatly reduced.
If the event picture is returned, the specific steps are: and the application end detects whether the video calendar exists at the moment according to the queried event moment calendar snapshot table, if so, the application end continuously queries the video travel record, queries the video snapshot record according to the travel time period, and finally acquires the video details of the video containing time period.
Because the video source of the recorder is compressed by time-lapse frame extraction, even if the time of day is known, it is very difficult to locate the ready specific video source in the video detail, so that metadata needs to be downloaded, that is, metadata detail is obtained according to metadata links, metadata detail is traversed again, the record of the real time corresponding to the frame is included in the metadata, the video frame closest to the time of inquiry is found, the frame is extracted and stored into a picture format, and finally the picture can be returned, specifically, the stored picture can be uploaded to cloud space, a public network link is obtained, the link is returned to a client, and the client can display browsing.
According to the method for searching the video of the automobile data recorder, provided by the embodiment of the invention, due to the reasonable storage of each snapshot table and the cloud disk, the application end can search the video more conveniently and rapidly. Specifically, the method continuously reduces the query scope through various pre-generated snapshot tables (calendars, strokes, summaries, details, labels and the like), and can rapidly index to records needing to be queried. In addition, because the video source file is compressed by time-lapse frame extraction in the embodiment of the invention, the video duration can be positioned after the specific time is searched by searching corresponding metadata to position the specific time, thereby being convenient for intercepting the required video data.
The embodiment of the present invention also provides a retrieval device for a video of a vehicle recorder, where the retrieval method for a video of a vehicle recorder is also applicable to the retrieval device of the embodiment of the present invention, referring to fig. 3, and the retrieval device 300 provided by the embodiment of the present invention includes: the system comprises a generation module 31, a first query module 32, a screening module 33, an acquisition module 34 and a return module 35.
The generating module 31 is configured to generate a video calendar snapshot table, a video travel table and a query video snapshot table according to the short video; the first query module 32 is configured to query a time ascending list meeting requirements from the short video according to a video calendar snapshot table corresponding to a query time; the screening module 33 is configured to screen a video travel time axis list meeting the requirements from the calendar video data according to the effective date and the corresponding video travel table; the obtaining module 34 is configured to correspondingly query a video snapshot table according to the video period parameter, and obtain a video detail including a target period from the video travel time axis list; the return module 35 is configured to return an event video or an event picture in the video detail.
The retrieval device of the automobile data recorder video provided by the embodiment of the invention continuously reduces the query range through various pre-generated snapshot tables, and can rapidly index to the record to be queried. In addition, because the video source file is compressed by time-lapse frame extraction in the embodiment of the invention, the video duration can be positioned after the specific time is searched by searching corresponding metadata to position the specific time, thereby being convenient for intercepting the required video data.
In some embodiments, the return module 35 includes: the device comprises a searching unit, an obtaining unit and a returning unit. The searching unit is used for searching metadata of the corresponding event according to the video travel time axis list; the obtaining unit is used for obtaining an event video or an event picture according to the metadata of the corresponding event; and the return unit is used for returning the event video or the event picture.
The embodiment of the invention also provides a service end of the automobile data recorder video, which comprises the following steps: a memory, a processor, and a computer program stored on the memory and executable on the processor. The memory may be at least one memory device located remotely from the aforementioned processor. Wherein the processor may be an apparatus as described in connection with fig. 3, the application program is stored in the memory, and the processor invokes the program code stored in the memory for performing the retrieval method in the above-described embodiment.
Those skilled in the art will further appreciate that the individual steps of the exemplary tachograph video retrieval method described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, and that the individual exemplary components and steps have been described generally in terms of functionality in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution.
Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation is not intended to be limiting. The computer software may be stored in a computer readable storage medium, and the program, when executed, may include the flow of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory, a random access memory, or the like.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
1. A method for retrieving a video of a vehicle recorder, wherein key frames in the video of the vehicle recorder are combined into a short video with a time-lapse, the method comprising:
generating a video calendar snapshot table, a video travel table and a query video snapshot table according to the short video;
inquiring a time ascending list meeting the requirements from the short video according to the video calendar snapshot list corresponding to the inquiring time;
according to the effective date, the corresponding video schedule screens out a video schedule time axis list meeting the requirements from the calendar video data;
according to the video time period parameters, correspondingly inquiring a video snapshot table, and acquiring video details containing a target time period from the video travel time axis list;
returning an event video or an event picture in the video detail;
the returning of the event video or the event picture in the video detail specifically comprises the following steps:
searching metadata of the corresponding event according to the video travel time axis list;
acquiring an event video or an event picture according to metadata of the corresponding event;
returning the event video or the event picture;
according to the metadata of the corresponding event, obtaining an event video specifically comprises the following steps:
finding out video files and structured data of corresponding time periods according to the metadata;
downloading the video files and the structured data in batches;
positioning to an accurate video time frame according to the structured data;
calculating the video duration of the corresponding moment according to the video moment frame;
intercepting video data of a plurality of intervals before and after the time frame according to the video duration;
carrying out video merging on the video data at the intervals to obtain event videos;
according to the metadata of the corresponding event, obtaining an event picture, specifically:
acquiring metadata details according to metadata links;
traversing metadata details, and finding a video frame nearest to the query time;
and extracting the video frame and storing the video frame into a picture format to obtain an event picture.
2. The retrieval method of claim 1, wherein after querying calendar compliant video data from the video calendar snapshot table based on the query time, the method further comprises:
and returning the queried calendar video data to the application end so that the application end displays the calendar video data through the UI interface.
3. The retrieval method of claim 1, wherein after querying the video schedule to screen out a satisfactory list of video schedules from the calendar video data based on the effective date, the method further comprises:
and returning the screened video travel time axis list to the application end so that the application end displays the video travel time axis list in a form with a playing window and a visual time axis.
4. A retrieval device for a vehicle event data recorder video, wherein key frames in the vehicle event data recorder video are combined into a short video with a time-lapse, the device comprising:
the generation module is used for generating a video calendar snapshot table, a video travel table and a query video snapshot table according to the short video;
the first query module is used for querying a time ascending list meeting the requirements from the short video according to a video calendar snapshot table corresponding to the query time;
the screening module is used for screening out a video travel time axis list meeting the requirements from the calendar video data according to the effective date and the corresponding video travel table;
the acquisition module is used for correspondingly inquiring a video snapshot table according to the video time period parameter and acquiring video details containing a target time period from the video travel time axis list;
the return module is used for returning the event video or the event picture in the video detail;
the return module is specifically configured to search metadata of a corresponding event according to the video travel time axis list; acquiring an event video or an event picture according to metadata of the corresponding event; returning the event video or the event picture;
the return module is also specifically used for finding out video files and structured data in corresponding time periods according to the metadata; downloading the video files and the structured data in batches; positioning to an accurate video time frame according to the structured data; calculating the video duration of the corresponding moment according to the video moment frame; intercepting video data of a plurality of intervals before and after the time frame according to the video duration; carrying out video merging on the video data at the intervals to obtain event videos;
the return module is also specifically used for acquiring metadata details according to metadata links; traversing metadata details, and finding a video frame nearest to the query time; and extracting the video frame and storing the video frame into a picture format to obtain an event picture.
5. The retrieval device of claim 4, wherein the return module comprises:
the searching unit is used for searching metadata of the corresponding event according to the video travel time axis list;
the obtaining unit is used for obtaining an event video or an event picture according to the metadata of the corresponding event;
and the return unit is used for returning the event video or the event picture.
6. The utility model provides a service end of vehicle event data recorder video which characterized in that includes: a memory, a processor, and a computer program stored on the memory and executable on the processor,
the processor, when executing the computer program, implements the retrieval method according to any one of claims 1 to 5.
7. A retrieval system for a vehicle event data recorder video, comprising:
an application end;
a vehicle-mounted end;
the service end of the automobile data recorder video is respectively connected with the application end and the vehicle-mounted end;
the server executes the retrieval method according to any one of claims 1 to 5 based on the application terminal and the vehicle-mounted terminal.
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| CN202110195796.0A CN113094551B (en) | 2021-02-19 | 2021-02-19 | Method, device, server and system for retrieving videos of automobile data recorder |
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| CN202110195796.0A CN113094551B (en) | 2021-02-19 | 2021-02-19 | Method, device, server and system for retrieving videos of automobile data recorder |
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| CN113094551B true CN113094551B (en) | 2023-09-19 |
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| CN114339299A (en) * | 2021-12-27 | 2022-04-12 | 司法鉴定科学研究院 | Video evidence obtaining method for automobile driving recorder |
| CN114550489A (en) * | 2022-01-28 | 2022-05-27 | 深圳市海雀科技有限公司 | Vehicle searching information processing method, system and related device |
| CN115348477A (en) * | 2022-04-28 | 2022-11-15 | 武汉众智数字技术有限公司 | Method and system for quickly retrieving videos based on time axis |
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